From: Hillf Danton <hdanton@sina.com>
To: syzbot <syzbot+fb4362a104d45ab09cf9@syzkaller.appspotmail.com>
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [comedi?] KMSAN: kernel-infoleak in do_insnlist_ioctl
Date: Thu, 31 Jul 2025 17:39:12 +0800 [thread overview]
Message-ID: <20250731093913.3644-1-hdanton@sina.com> (raw)
In-Reply-To: <688b1b62.a00a0220.26d0e1.0039.GAE@google.com>
> Date: Thu, 31 Jul 2025 00:29:38 -0700 [thread overview]
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: e8d780dcd957 Merge tag 'slab-for-6.17' of git://git.kernel..
> git tree: upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=154b8f82580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=30a934bba3cd727
> dashboard link: https://syzkaller.appspot.com/bug?extid=fb4362a104d45ab09cf9
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10a04ca2580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13a269bc580000
#syz test
--- x/drivers/comedi/comedi_fops.c
+++ y/drivers/comedi/comedi_fops.c
@@ -1566,7 +1566,7 @@ static int do_insnlist_ioctl(struct come
/* Allocate scratch space for all instruction data. */
data = kmalloc_array(max_n_data_required, sizeof(unsigned int),
- GFP_KERNEL);
+ GFP_KERNEL | __GFP_ZERO);
if (!data) {
ret = -ENOMEM;
goto error;
--
next prev parent reply other threads:[~2025-07-31 9:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-21 19:30 [syzbot] [kernel?] " syzbot
2025-07-31 7:29 ` [syzbot] [comedi?] " syzbot
2025-07-31 9:39 ` Hillf Danton [this message]
2025-07-31 11:03 ` syzbot
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